ia64: fix section mismatch swiotlb_dma_init -> swiotlb_init

Impact: Section fix

WARNING: vmlinux.o(.text+0x596d2): Section mismatch in
reference from the function swiotlb_dma_init() to the function
.init.text:swiotlb_init()
The function swiotlb_dma_init() references
the function __init swiotlb_init().
This is often because swiotlb_dma_init lacks a __init
annotation or the annotation of swiotlb_init is wrong.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/ia64/kernel/pci-swiotlb.c

@@ -33,7 +33,7 @@ struct dma_map_ops swiotlb_dma_ops = {
 	.mapping_error = swiotlb_dma_mapping_error,
 };
 
-void swiotlb_dma_init(void)
+void __init swiotlb_dma_init(void)
 {
 	dma_ops = &swiotlb_dma_ops;
 	swiotlb_init();